EP2190605B8 - A gripping and handling device for metal containers - Google Patents

A gripping and handling device for metal containers Download PDF

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Publication number
EP2190605B8
EP2190605B8 EP07790149A EP07790149A EP2190605B8 EP 2190605 B8 EP2190605 B8 EP 2190605B8 EP 07790149 A EP07790149 A EP 07790149A EP 07790149 A EP07790149 A EP 07790149A EP 2190605 B8 EP2190605 B8 EP 2190605B8
Authority
EP
European Patent Office
Prior art keywords
metal container
working
upper portion
metal
snap ring
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Not-in-force
Application number
EP07790149A
Other languages
German (de)
French (fr)
Other versions
EP2190605B1 (en
EP2190605A1 (en
Inventor
Roberto Frattini
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Frattini-Tech AG
Original Assignee
FRATTINI-TECH AG
FRATTINI TECH AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by FRATTINI-TECH AG, FRATTINI TECH AG filed Critical FRATTINI-TECH AG
Priority to PL07790149T priority Critical patent/PL2190605T3/en
Publication of EP2190605A1 publication Critical patent/EP2190605A1/en
Application granted granted Critical
Publication of EP2190605B1 publication Critical patent/EP2190605B1/en
Publication of EP2190605B8 publication Critical patent/EP2190605B8/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D51/00—Making hollow objects
    • B21D51/16—Making hollow objects characterised by the use of the objects
    • B21D51/26—Making hollow objects characterised by the use of the objects cans or tins; Closing same in a permanent manner
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers

Definitions

  • This invention refers to a gripping and handling device for a metal containers.
  • tnis invention rerers to a gripping ana nanaiing device for metal containers to be used, as a gripping means, especially in high-speed machines to perform a sequence of mechanical working operations, preferably along an extended portion of their side surface.
  • the metal containers that are handled by the device of this invention are made from metal extruded, deep-drawn or deep-drawn/ironed metal rough pieces, of aluminium, its alloys or other suitable materials; these containers, can be painted inside and/or outside and lithographed along the outer side surface before starting the sequence of operations that deform their external side surface
  • These metal containers mainly undergo plastic deformation processes that are aimed at changing their geometrical structure in a partial manner (the so-called “necking” or “tapering” process), in a global manner (the so-called “shaping” process) or by making hollow or embossed shaped marks on pre-set portions of the side surface of the metal container (“embossing/debossing” process). It is known that in high-speed machines, the metal container is transferred from one working tower or station to another in order to perform the sequence of working operations on its outer side surface. '
  • the transfer stage of metal containers from one working station to the one coming next is particularly critical, since their transport system should allow a safe grip to avoid losing the container, but the grip also has to be sufficiently soft to avoid damaging the side surface of the metal container.
  • the metal container is diverted and secured for a short length on the working tower coming after the one that has been left, by means of special guides so as to allow the gripping means or "receiving pocket" to reach a sufficient vacuum degree.
  • These guides come into contact with the side surface of the metal container, so as to produce some dragging that is likely to damage the side surface of the container.
  • a further problem stands in that the foregoing contacts or dragging, already hinted at above, tend to alter the angular position of the metal container; indeed, the angular position of the metal container as to its longitudinal axis is not controlled and may vary during the transfer from one working tower to the one coming next.
  • Another problem is that the gripping of the metal container strongly relies on the quality of the structure of its surface; an outer side surface bearing defects makes it difficult to high-speed handle the metal container due to "leaks" that reduce the vacuum degree and, hence, the strength that may be exerted on the surface.
  • Another disadvantage stands in that the chance of losing/damaging the metal container during the transfer stage from one working station to the one coming next increases in proportion to the number of operations carried out on the container and, therefore, to the complexity of the shape achieved, since contact with the side surface of the container recurs at each transfer.
  • the described handling system only allows handling metal containers whose outer side surface presents an extensive cylindrical section, as the grip by the vacuum technique only proves to be effective if action is taken on an extended portion of the outer side surface of the metal container.
  • This cylindrical segment must not be smaller than approximately 70 ⁇ 80% of the outer side surface of the metal container.
  • the market is currently oriented to the high-speed production of metal containers in the shape of "bottle cans" and/or “contour cans" that are machined on almost the entire outer side surface; these containers have a limited cylindrical length and demand, for their working, a large number of passages.
  • the vacuum gripping technology for the direct transfer of the metal container from one working station to the one coming next proves to be unsuitable to guarantee a safe, accurate and firm gripping of the container itself.
  • the object of this invention is to solve the foregoing problems. More particularly, the object of this invention is to provide a device to grip and handle a metal container that is adapted to ensure a gripping that is safe as well as sufficiently soft over a limited length of its side surface, that is basically ranging between approximatelylO and 35 mm, and such as to avoid dragging and/or contacts with the metal container while it is being transferred from one working station to the one coming next.
  • a further object of this invention is to provide a device adapted to ensure that the metal container is accurately and coaxially positioned to the working equipment, and in addition is angularly balanced.
  • a further object of this invention is to provide a device that allows the size change-over to be rapidly and easily carried out depending on the type of metal container being worked. Not last among the objects of this invention is the provision of a device equipped with an optimal gripping interface both during the transfer of the metal container and during its working, independent of the "size" or type of the metal container.
  • a further object of this invention is to provide the users of a metal container gripping and handling device that is such as to ensure a high level of resistance and reliability over time, and also such as to be easily and cheaply manufactured.
  • the metal container gripping and handling device of this invention which includes a first or lower portion that can interface-connect the device with the machine both at the working stage and during the transfer of the container from one working station to the following one of the highspeed machine, and a second or upper portion that is such as to firmly grip the metal container during its handling and throughout the entire sequence of working actions.
  • figure 1 schematically illustrates a longitudinal section view of a metal container gripping and handling device of this invention with the container being gripped
  • figure 2 schematically illustrates a longitudinal section of the device of this invention at an operating stage when the metal container is inserted into the device
  • figure 3 schematically illustrates a longitudinal section of the device of this invention at an operating stage when the metal container is released from the device.
  • the metal container gripping and handling device of this invention includes a body that is basically in the style of a "bucket", which is defined by a first or lower portion 12 basically circular in shape, of limited height and made of a metal material, such as aluminium, or a plastic material or any other suitable one.
  • This lower portion 12 defines an active or interface functional surface of the device of this invention that interacts with each of the several part- bearing tables 14 of the machine for the deformation of metal containers.
  • This lower portion 12 presents at least one reference member, not shown in the figures, which is able to orient or balance the device of the invention as to the several part-bearing tables 14 of the highspeed machine.
  • the foregoing "buckef'-shaped body starting from the central area of the upper front of the lower portion 12 as opposed to the part- bearing table 14, includes a second or upper portion 16 that develops, starting from the front-central area of the lower portion 12 and in the direction of the bottom of a metal container 26, into a ring expansion whose diameter is basically smaller than that of the lower portion itself.
  • the mentioned upper portion 16 which is made, like the lower portion 12, of a metal material or any other suitable one, is adapted to make up a seat that houses the items that will be described in full detail hereinafter.
  • the upper portion 16 may be developed starting from the lower portion 12 with a diameter that basically matches that of the lower portion itself, or with a larger diameter.
  • the inner surface of the upper portion 16 preferably develops for a first section, basically equalling at least half the height of the upper portion itself, with a constant-diameter course, and for a second section with a course featuring progressively increasing diameters, in the direction of the bottom of the metal container 26, to define a taper whose function will be described in full detail hereinafter.
  • a snap ring 24 is located inside the upper portion 16 and coaxially to it whose height is basically the same as the height of the upper portion 16 and whose outer surface presents a taper that matches that of the inner surface of the upper portion itself.
  • the mentioned snap ring 24, slidingly arranged to the upper portion 16 as described hereinafter, is made of one sole piece or is defined by the assembly of two or more sectors; the same snap ring 24 is made of a plastic, metal or other suitable material and is meant to firmly receive and retain the metal container 26, inserted starting from its bottom.
  • a member 28 which is hollow in the centre, and whose upper portion turned to the bottom of the metal container 26 defines a disc 30 whose upper surface presents a concave shaping that reproduces, in a "negative" form, the development of the outer bottom surface of the metal container itself.
  • the lower portion of this member 28 forms an appendage that is basically circular in section, in the opposite direction to the bottom of the metal container and towards the lower front of the lower portion 12 turned to the part-bearing table 14.
  • This member 28 is bound to the lower portion 12 by means of retaining rings 29, for example a Seeger ring, or in another known manner.
  • the lower surface of the disc 30 of this member 28 bears on the upper front of a flanged sleeve 32 located inside the "buckef'-shaped body; in the region comprised between the lower surface of the disc 30 of the member 28 and the upper front of the sleeve 32, one or more bearings 34, typically of the axial type or of another known type can be found, these being such as to allow the metal container to be oriented, as explained hereinafter.
  • the sleeve 32 is rigidly bound, in a known manner, to the lower portion 12 of the "buckef'-shaped body.
  • a return member typically at least one spring 38, preferably helical in type or of another known sort, is arranged on the outside of the sleeve 32 and coaxially to it.
  • a stem 40 is inserted in a coaxial position as to the sleeve 32 and to the member 28; on the outside of the stem 40 and coaxially to it there is at least a further return member, defined for instance by at least a further spring 52 of helical type or of another known sort and adapted to serve the function that will be described hereinafter.
  • the snap ring 24 is moved in the axial direction by means of an actuating means (not shown in the figures), which exerts a thrusting action on the lower front of the snap ring, opposed to the upper front of insertion of the metal container, e.g. by means of two or more pins 50 that slide axially as to the lower front of the lower portion 12; this actuating means co-operating with the above- mentioned spring 38.
  • the lower portion 12 is dimensioned absolutely independently of the metal container 26 and is the same for the various types of metal containers. Differently the other members building the device of the invention, such as the snap ring 24 and the disc 30 of the member 28 are manufactured based on the specific geometrical characteristics of the metal container that has to be worked.
  • the upper portion 16 can be dimensioned absolutely independently of the size of the metal container that has to be worked.
  • the operation of such a device basically comprises three stages:
  • an active or transfer stage when the process is in progress, that is the stage when the metal container 26 is rigidly gripped and stabilized as to the device of the invention and during which the transfer and working of the container takes place;
  • the device of this invention is preferably in the "close" configuration state in order to actively prevent any undesired opening of the device due to disturbing phenomena such as vibration or the like.
  • the insertion of the metal container 26 is carried out as schematised in figure 2, wherein the device of this invention is depicted in the "open" configuration state.
  • the actuating means located next to the table-bearing 14 exerts a thrusting action on the snap ring 24 which compresses the spring 38 and simultaneously moyes forwards in the axial direction. While sliding, due to the taper of its outer side surface and to that of the inner side surface of the upper portion 16, this snap ring 24 moves forward in the direction of the bottom of the metal container 26 and, after losing contact with the tapered inner side surface of the upper portion 16, expands radially.
  • the metal container 26 With the device of this invention in the "open” configuration, the metal container 26 is inserted according to the direction marked by the arrow "X" and next to its bottom; the convex peripheral portion of the bottom of the metal container leads to contact with the shaping of the upper surface of the disc 30 of member 28.
  • the metal container 26 can be adapted to a possible orientation in the device of the invention by means of one or more bearings 34 of the sleeve 32.
  • the same device of this invention is possibly oriented or phased to the table-bearing table 14, for instance by means of at least one reference member, not shown in the figures, and to which reference has been made above.
  • the actuating means (not shown) returns to the stop position and, hence, the spring 38, previously compressed, flexibly returns the snap ring 24 in the direction of the lower portion 12; in these conditions, the device of this invention stands in the "closed" configuration which, as already said before, is the stop configuration of this device.
  • the metal container 26 is stabilized to the device of the invention with a safe and firm grip performed along a limited length of its side surface, which basically ranges between- 10 and 35 mm.
  • Figure 3 is a schematic representation of the release or extraction stage of the metal container 26 from the device of this invention at the end of the surface buckling stage of the container.
  • the device of this invention shifts from the "closed” to the "open” configuration, as already indicated before, and simultaneously causes the metal container to be released from the snap ring 24.
  • a further actuating means exerts a thrusting action, according to the direction marked by .the arrow "Y", on the lower base of the stem or extraction pin 40 that presses against the bottom of the metal container 26 and thus performs its extraction according to the direction marked by the arrow "Z" in figure 3.
  • the metal container gripping and handling device advantageously defines a mechanical device that grips the container, in a safe as well as sufficiently soft manner, along a limited length of its outer side surface, so as to allow the working of containers of the "bottle can” and/or “contour can” type to be carried out.
  • the metal container and the device of this invention become integral with one another within the working process; suitable surfaces of the device manage all contacts and/or dragging while the metal container is being transferred from one working tower or station to the one coming next, thus holding integral the side surface of the container.
  • this device presents an interface to allow the metal container holding, an interface to undergo a safe mechanical grip of the device itself during its transfer, and a further interface to ensure the correct positioning and orientation during the working stage.
  • These interfaces can be advantageously made of a high- resistance material so as to also be able to act on them with great forces.
  • a further advantage stands in that the interaction between ' the device of this invention and the metal container only takes place at the starting (insertion) and final (extraction) process stages, independent of the structural complexity of the metal container; during the working stages, the metal container is firmly arranged to the device of this invention.
  • a further advantage stands in that the portion of device of this invention that engages the part-bearing table, that is the lower portion 12, is common to all types of metal containers and is such as not to require the geometrical characteristics of th ⁇ working stations to be changed, with an ensuing saving in terms of retooling and maintenance costs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manipulator (AREA)
  • Specific Conveyance Elements (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)
  • Press Drives And Press Lines (AREA)
  • Filling Of Jars Or Cans And Processes For Cleaning And Sealing Jars (AREA)
  • Details Of Rigid Or Semi-Rigid Containers (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

A device to grip and handle a metal container, obtained as an extruded, deep-drawn or deep-drawn/ironed metal rough piece, especially suitable for use on high-speed machines intended to perform, in a sequence, a plurality of mechanical working operations or other sort of working on the metal container, and including a first or lower portion that is fit to interface-connect the device to the machine both at the working stage and at the transfer stage of the high-speed machine from one working station to the one coming next, and a second or upper portion that is adapted for firmly gripping the metal container during the handling and the entire working sequence of working operations.

Description

"A gripping and handling device for metal containers"
DESCRIPTION TECHNICAL FIELD
This invention refers to a gripping and handling device for a metal containers.
More particularly, tnis invention rerers to a gripping ana nanaiing device for metal containers to be used, as a gripping means, especially in high-speed machines to perform a sequence of mechanical working operations, preferably along an extended portion of their side surface. BACKGROUND ART
The metal containers that are handled by the device of this invention are made from metal extruded, deep-drawn or deep-drawn/ironed metal rough pieces, of aluminium, its alloys or other suitable materials; these containers, can be painted inside and/or outside and lithographed along the outer side surface before starting the sequence of operations that deform their external side surface These metal containers mainly undergo plastic deformation processes that are aimed at changing their geometrical structure in a partial manner (the so-called "necking" or "tapering" process), in a global manner (the so-called "shaping" process) or by making hollow or embossed shaped marks on pre-set portions of the side surface of the metal container ("embossing/debossing" process). It is known that in high-speed machines, the metal container is transferred from one working tower or station to another in order to perform the sequence of working operations on its outer side surface. '
The transfer stage of metal containers from one working station to the one coming next is particularly critical, since their transport system should allow a safe grip to avoid losing the container, but the grip also has to be sufficiently soft to avoid damaging the side surface of the metal container.
In metal container continuous-working machines, namely those working the above-described containers, in the shape of cans or "pop cans" and preferably addressed to the beverage market, the grip directly occurs along the cylindrical section of the side surface of the metal container, both at the transfer and the working stages, by means of slots or "pockets" wherein a vacuum degree is created such as to allow the above container to be gripped. However, this type of grip for handling metal containers presents problems of great relevance.
During the transfer from one working station or tower to the one coming next, the metal container is diverted and secured for a short length on the working tower coming after the one that has been left, by means of special guides so as to allow the gripping means or "receiving pocket" to reach a sufficient vacuum degree. These guides come into contact with the side surface of the metal container, so as to produce some dragging that is likely to damage the side surface of the container. A further problem stands in that the foregoing contacts or dragging, already hinted at above, tend to alter the angular position of the metal container; indeed, the angular position of the metal container as to its longitudinal axis is not controlled and may vary during the transfer from one working tower to the one coming next.
Another problem is that the gripping of the metal container strongly relies on the quality of the structure of its surface; an outer side surface bearing defects makes it difficult to high-speed handle the metal container due to "leaks" that reduce the vacuum degree and, hence, the strength that may be exerted on the surface.
Another disadvantage stands in that the chance of losing/damaging the metal container during the transfer stage from one working station to the one coming next increases in proportion to the number of operations carried out on the container and, therefore, to the complexity of the shape achieved, since contact with the side surface of the container recurs at each transfer.
Further disadvantageous is that the described handling system only allows handling metal containers whose outer side surface presents an extensive cylindrical section, as the grip by the vacuum technique only proves to be effective if action is taken on an extended portion of the outer side surface of the metal container. This cylindrical segment must not be smaller than approximately 70÷80% of the outer side surface of the metal container. However, the market is currently oriented to the high-speed production of metal containers in the shape of "bottle cans" and/or "contour cans" that are machined on almost the entire outer side surface; these containers have a limited cylindrical length and demand, for their working, a large number of passages. Accordingly, the vacuum gripping technology for the direct transfer of the metal container from one working station to the one coming next proves to be unsuitable to guarantee a safe, accurate and firm gripping of the container itself. DISCLOSURE OF INVENTION The object of this invention is to solve the foregoing problems. More particularly, the object of this invention is to provide a device to grip and handle a metal container that is adapted to ensure a gripping that is safe as well as sufficiently soft over a limited length of its side surface, that is basically ranging between approximatelylO and 35 mm, and such as to avoid dragging and/or contacts with the metal container while it is being transferred from one working station to the one coming next.
A further object of this invention is to provide a device adapted to ensure that the metal container is accurately and coaxially positioned to the working equipment, and in addition is angularly balanced. A further object of this invention is to provide a device that allows the size change-over to be rapidly and easily carried out depending on the type of metal container being worked. Not last among the objects of this invention is the provision of a device equipped with an optimal gripping interface both during the transfer of the metal container and during its working, independent of the "size" or type of the metal container.
A further object of this invention is to provide the users of a metal container gripping and handling device that is such as to ensure a high level of resistance and reliability over time, and also such as to be easily and cheaply manufactured.
These and other objects are achieved by the metal container gripping and handling device of this invention, which includes a first or lower portion that can interface-connect the device with the machine both at the working stage and during the transfer of the container from one working station to the following one of the highspeed machine, and a second or upper portion that is such as to firmly grip the metal container during its handling and throughout the entire sequence of working actions. BRIEF DESCRIPTION OF DRAWINGS
The structural and functional characteristics of the gripping and handling device of a metal container of this invention can be better understood from the detailed description that follows, wherein reference is made to the attached drawings that illustrate a preferential embodiment that is not meant to be restrictive, and wherein: figure 1 schematically illustrates a longitudinal section view of a metal container gripping and handling device of this invention with the container being gripped; figure 2 schematically illustrates a longitudinal section of the device of this invention at an operating stage when the metal container is inserted into the device; figure 3 schematically illustrates a longitudinal section of the device of this invention at an operating stage when the metal container is released from the device.
BEST MODE FOR CARRYING OUT THE INVENTION With reference to the foregoing figures, the metal container gripping and handling device of this invention, generally marked, with 10 in figure 1, includes a body that is basically in the style of a "bucket", which is defined by a first or lower portion 12 basically circular in shape, of limited height and made of a metal material, such as aluminium, or a plastic material or any other suitable one. This lower portion 12 defines an active or interface functional surface of the device of this invention that interacts with each of the several part- bearing tables 14 of the machine for the deformation of metal containers.
This lower portion 12 presents at least one reference member, not shown in the figures, which is able to orient or balance the device of the invention as to the several part-bearing tables 14 of the highspeed machine.
The foregoing "buckef'-shaped body, starting from the central area of the upper front of the lower portion 12 as opposed to the part- bearing table 14, includes a second or upper portion 16 that develops, starting from the front-central area of the lower portion 12 and in the direction of the bottom of a metal container 26, into a ring expansion whose diameter is basically smaller than that of the lower portion itself.
The mentioned upper portion 16, which is made, like the lower portion 12, of a metal material or any other suitable one, is adapted to make up a seat that houses the items that will be described in full detail hereinafter.
In alternative embodiments, the upper portion 16 may be developed starting from the lower portion 12 with a diameter that basically matches that of the lower portion itself, or with a larger diameter. The inner surface of the upper portion 16 preferably develops for a first section, basically equalling at least half the height of the upper portion itself, with a constant-diameter course, and for a second section with a course featuring progressively increasing diameters, in the direction of the bottom of the metal container 26, to define a taper whose function will be described in full detail hereinafter. Inside the upper portion 16 and coaxially to it a snap ring 24 is located, whose height is basically the same as the height of the upper portion 16 and whose outer surface presents a taper that matches that of the inner surface of the upper portion itself.
The mentioned snap ring 24, slidingly arranged to the upper portion 16 as described hereinafter, is made of one sole piece or is defined by the assembly of two or more sectors; the same snap ring 24 is made of a plastic, metal or other suitable material and is meant to firmly receive and retain the metal container 26, inserted starting from its bottom.
Inside the snap ring 24 and coaxially to it there is a member 28, which is hollow in the centre, and whose upper portion turned to the bottom of the metal container 26 defines a disc 30 whose upper surface presents a concave shaping that reproduces, in a "negative" form, the development of the outer bottom surface of the metal container itself. The lower portion of this member 28 forms an appendage that is basically circular in section, in the opposite direction to the bottom of the metal container and towards the lower front of the lower portion 12 turned to the part-bearing table 14. This member 28 is bound to the lower portion 12 by means of retaining rings 29, for example a Seeger ring, or in another known manner. The lower surface of the disc 30 of this member 28 bears on the upper front of a flanged sleeve 32 located inside the "buckef'-shaped body; in the region comprised between the lower surface of the disc 30 of the member 28 and the upper front of the sleeve 32, one or more bearings 34, typically of the axial type or of another known type can be found, these being such as to allow the metal container to be oriented, as explained hereinafter.
The sleeve 32 is rigidly bound, in a known manner, to the lower portion 12 of the "buckef'-shaped body. A return member, typically at least one spring 38, preferably helical in type or of another known sort, is arranged on the outside of the sleeve 32 and coaxially to it.
A stem 40 is inserted in a coaxial position as to the sleeve 32 and to the member 28; on the outside of the stem 40 and coaxially to it there is at least a further return member, defined for instance by at least a further spring 52 of helical type or of another known sort and adapted to serve the function that will be described hereinafter. The snap ring 24 is moved in the axial direction by means of an actuating means (not shown in the figures), which exerts a thrusting action on the lower front of the snap ring, opposed to the upper front of insertion of the metal container, e.g. by means of two or more pins 50 that slide axially as to the lower front of the lower portion 12; this actuating means co-operating with the above- mentioned spring 38.
It has to be noticed that the lower portion 12 is dimensioned absolutely independently of the metal container 26 and is the same for the various types of metal containers. Differently the other members building the device of the invention, such as the snap ring 24 and the disc 30 of the member 28 are manufactured based on the specific geometrical characteristics of the metal container that has to be worked.
Even the upper portion 16 can be dimensioned absolutely independently of the size of the metal container that has to be worked. Here follows an explanation of how the metal container gripping and handling device of this invention, which has been described in details above in its component parts and with reference to a preferential embodiment, operates. The operation of such a device basically comprises three stages:
- an insertion stage, at the process start, of the metal container 26, that is the first stage of relative movement between the metal container and the device of this invention;
- an active or transfer stage, when the process is in progress, that is the stage when the metal container 26 is rigidly gripped and stabilized as to the device of the invention and during which the transfer and working of the container takes place;
- an extraction stage, at the end of the process, that is the stage when the relative dragging movement takes place and when the container 26 moves away from the device of this invention.
When the metal container 26 has not yet been inserted into the device, the device of this invention is preferably in the "close" configuration state in order to actively prevent any undesired opening of the device due to disturbing phenomena such as vibration or the like.
The insertion of the metal container 26 is carried out as schematised in figure 2, wherein the device of this invention is depicted in the "open" configuration state. In order to open the device of this invention and to be able to insert the metal container 26, the actuating means (not shown) located next to the table-bearing 14 exerts a thrusting action on the snap ring 24 which compresses the spring 38 and simultaneously moyes forwards in the axial direction. While sliding, due to the taper of its outer side surface and to that of the inner side surface of the upper portion 16, this snap ring 24 moves forward in the direction of the bottom of the metal container 26 and, after losing contact with the tapered inner side surface of the upper portion 16, expands radially. With the device of this invention in the "open" configuration, the metal container 26 is inserted according to the direction marked by the arrow "X" and next to its bottom; the convex peripheral portion of the bottom of the metal container leads to contact with the shaping of the upper surface of the disc 30 of member 28. At this stage, the metal container 26 can be adapted to a possible orientation in the device of the invention by means of one or more bearings 34 of the sleeve 32.
The same device of this invention is possibly oriented or phased to the table-bearing table 14, for instance by means of at least one reference member, not shown in the figures, and to which reference has been made above.
With the metal container thus arranged, the actuating means (not shown) returns to the stop position and, hence, the spring 38, previously compressed, flexibly returns the snap ring 24 in the direction of the lower portion 12; in these conditions, the device of this invention stands in the "closed" configuration which, as already said before, is the stop configuration of this device. As schematised in figure 1, the metal container 26 is stabilized to the device of the invention with a safe and firm grip performed along a limited length of its side surface, which basically ranges between- 10 and 35 mm.
Figure 3 is a schematic representation of the release or extraction stage of the metal container 26 from the device of this invention at the end of the surface buckling stage of the container. At this stage, the device of this invention shifts from the "closed" to the "open" configuration, as already indicated before, and simultaneously causes the metal container to be released from the snap ring 24. To achieve the release or extraction of the metal container 26 for the snap ring 24, a further actuating means (not shown in the figures) exerts a thrusting action, according to the direction marked by .the arrow "Y", on the lower base of the stem or extraction pin 40 that presses against the bottom of the metal container 26 and thus performs its extraction according to the direction marked by the arrow "Z" in figure 3.
INDUSTRIAL APPLICABILITY
As one may deduce from the foregoing description, the advantages brought about by the invention are obvious.
The metal container gripping and handling device advantageously defines a mechanical device that grips the container, in a safe as well as sufficiently soft manner, along a limited length of its outer side surface, so as to allow the working of containers of the "bottle can" and/or "contour can" type to be carried out. The metal container and the device of this invention become integral with one another within the working process; suitable surfaces of the device manage all contacts and/or dragging while the metal container is being transferred from one working tower or station to the one coming next, thus holding integral the side surface of the container. As a matter of fact, this device presents an interface to allow the metal container holding, an interface to undergo a safe mechanical grip of the device itself during its transfer, and a further interface to ensure the correct positioning and orientation during the working stage. These interfaces can be advantageously made of a high- resistance material so as to also be able to act on them with great forces.
A further advantage stands in that the interaction between 'the device of this invention and the metal container only takes place at the starting (insertion) and final (extraction) process stages, independent of the structural complexity of the metal container; during the working stages, the metal container is firmly arranged to the device of this invention.
A further advantage stands in that the portion of device of this invention that engages the part-bearing table, that is the lower portion 12, is common to all types of metal containers and is such as not to require the geometrical characteristics of th^ working stations to be changed, with an ensuing saving in terms of retooling and maintenance costs.
Although the foregoing invention has been described by making special reference to a preferential embodiment, which is only provided as an illustration and is not meant to be restrictive in character, many variations and changes will be obvious to anybody skilled in the art in the light of the foregoing disclosure. Hence, this invention is intended to include all those changes and variations that fall within the spirit and the protective scope of the attached claims.

Claims

1. A 'device (10) for gripping and handling & metal container (26), obtained as a extruded, deep-drawn or deep- drawn/wire-drawn metal rough piece, specially suitable for use on high speed machines intended to perform a plurality of mechanical working sequences or other sort of working on the metal container (26), characterized in that the device includes ' two portions, whereof:
- a first or lower portion (12), used to interface-connect the device to the machine both at the working stage and at the high-speed transfer stage of the machine from one working station to the one coming next;
- ' a second or upper portion (16) used to firmly grip the metal container (26) during the entire working sequence 2. A device according to claim 1, characterized in that it includes a body whose lower portion (12) presents at least one reference member for the correct positioning/balancing of the device to the part-bearing table(s) (14) of the metal container (26) working machine. 3. A device according to any of the previous claims, characterized in that the upper portion (16) defines a ring expansion whose inner surface presents diameters that progressively increase in the direction of the bottom of the rrfetal container (26) so as to define a taper.
4. A device according to claim 1, characterized in that it includes retaining means that are adapted to stabilize the metal container (26).
5. A device according to claim 4, characterized in that the retaining means are defined by an axially moving snap ring
(24) lodging within the body defined by the lower portion (12) and by the upper portion (16).
6. A device according to claim 5, characterized in that the outer surface of the snap ring (24) presents a taper that matches that of the inner surface of the upper portion (16).
7. A device according to any of claims 5 and 6, characterized in that the snap ring (24) performs the grip and the stabilization of the metal container (26) along a limited length of its side surface, ranging from 10 to 35 mm. 8. A device according to any of claims 5 througn /, cnaracieπzeα in that the snap ring (24) is axially moved actuating means that co-operate with a return member.
9. A device according to claim 8, characterized in that the return member is defined by at least one spring (38). 10. A device according to any of the previous claims, characterized in that inside the snap ring (24), and coaxial thereto, a member (28) is located, that is hollow in the centre, whose upper portion defines a disc (30) with a concave shaping.
11. A device according to claim 10, characterized in that inside the member (28), and coaxially thereto, a stem (40) is inserted which is used to operate the extraction of the metal container (26). 12. A device according to claim 11, characterized in that the movement of the stem (40) is regulated by a further actuating means, which co-operates with a further stem return member.
13. A device according to claim 12, characterized in that the further stem (40) return member is defined by at least one further spring (52).
14. A device according to any of the previous claims, characterized in that it includes at least one bearing (34), which is placed between the lower surface of the disc (30) of the member (28) and the upper front of a sleeve (32) that is located within the body.
EP07790149A 2007-06-13 2007-06-13 A gripping and handling device for metal containers Not-in-force EP2190605B8 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07790149T PL2190605T3 (en) 2007-06-13 2007-06-13 A gripping and handling device for metal containers

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000417 WO2008152661A1 (en) 2007-06-13 2007-06-13 A gripping and handling device for metal containers

Publications (3)

Publication Number Publication Date
EP2190605A1 EP2190605A1 (en) 2010-06-02
EP2190605B1 EP2190605B1 (en) 2011-02-23
EP2190605B8 true EP2190605B8 (en) 2011-09-14

Family

ID=38862618

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Application Number Title Priority Date Filing Date
EP07790149A Not-in-force EP2190605B8 (en) 2007-06-13 2007-06-13 A gripping and handling device for metal containers

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US (1) US8336363B2 (en)
EP (1) EP2190605B8 (en)
JP (1) JP5341885B2 (en)
KR (2) KR20140109511A (en)
CN (1) CN101795789B (en)
AT (1) ATE499164T1 (en)
BR (1) BRPI0721641A2 (en)
DE (1) DE602007012777D1 (en)
ES (1) ES2361726T3 (en)
MX (1) MX2009013498A (en)
PL (1) PL2190605T3 (en)
WO (1) WO2008152661A1 (en)

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KR102048105B1 (en) * 2012-02-07 2019-11-22 유니버설세이칸 가부시키가이샤 Can body diameter reduction device, can holder, can production device, and can diameter reducing method
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Also Published As

Publication number Publication date
KR101462702B1 (en) 2014-11-17
US8336363B2 (en) 2012-12-25
ES2361726T3 (en) 2011-06-21
MX2009013498A (en) 2010-01-27
JP2010528875A (en) 2010-08-26
PL2190605T3 (en) 2012-03-30
DE602007012777D1 (en) 2011-04-07
JP5341885B2 (en) 2013-11-13
KR20100042252A (en) 2010-04-23
BRPI0721641A2 (en) 2013-02-05
EP2190605B1 (en) 2011-02-23
EP2190605A1 (en) 2010-06-02
KR20140109511A (en) 2014-09-15
CN101795789A (en) 2010-08-04
CN101795789B (en) 2013-09-25
WO2008152661A1 (en) 2008-12-18
US20100126245A1 (en) 2010-05-27
ATE499164T1 (en) 2011-03-15

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